Behringer FBQ6200 manual 2.2Rear panel, above and of the FBQ1502 below, rear of the FBQ3102

ULTRAGRAPH PRO FBQ1502/ULTRAGRAPH PRO FBQ3102/ULTRAGRAPH PRO FBQ6200

Fig. 2.1: Front panel control elements of the FBQ3102

(above) and of the FBQ1502 (below)

The I/O METER IN/OUT switch lets you alternate between displaying the input and the output signal level. When the switch is depressed, the output signal level is shown. The FBQ1502 does not feature this switch.

When you press the FBQ switch, the FBQ feedback detection system is activated. The frequency (or frequen- cies) that evoke feedback is/are indicated by means of a lighted fader LED. All other LEDs are toned down. Now, simply lower the respective frequency range somewhat until you eliminate the feedback and the LED no longer lights up.

The AUDIO IN/OUT switch is used to enable or disable the entire equalizer section. The FBQ1502 does this electronically, while the FBQ3102 and the FBQ6200 feature a relay-driven hard bypass function. As long as the switch is not depressed or while the equalizer is not powered up, the inputs and the outputs are directly connected to one another. The AUDIO IN/OUT switch is used to alternate between A and B, i.e. to compare the original unprocessed signal with the processed signal.

The INPUT control is used to adjust the input signal level. You can boost/attenuate the signal level from +15 to -15 dB.

The LOW CUT control is used to adjust the lower cut-off frequency of your ULTRAGRAPH PRO. The high-pass filter (18 dB/oct.) covers the range between 10 and 400 Hz, whereby the filter lets the signal pass through unprocessed, when the control is in the 10 Hz position.

The FBQ1502 features a switchable high-pass filter (LOW CUT) instead of a low cut control, and its cut-off frequency is 25 Hz.

The HIGH CUT control is used to adjust the upper cut-off frequency of your ULTRAGRAPH PRO. The low-pass filter (18 dB/oct.) covers the range between 2.5 and 30 kHz, whereby the filter lets the signal pass through unprocessed when the control is in the 30 kHz position.

+Use the high-pass and low-pass filters to define the frequency range you wish to process. This provides you with an efficient way to limit the bandwidth you work with.

The RANGE switch lets you alternate between the maximum value of lowering/increasing of individual frequencies from 12 dB to 6 dB (switch depressed).

These are the 31 SLIDING CONTROLS (FBQ1502: 15 sliding controls per channel) for individual frequency bands. When in “0” position, the particular frequency range is not processed at all. To boost a frequency range, pull the sliding control upward; to attenuate, pull the sliding control downward.

+To emphasize a frequency range, you don’t necessarily have to move its respective sliding control upward; try lowering surrounding frequency ranges instead. This way, you avoid causing the next piece of equipment in your sound path to overdrive. You also preserve valuable dynamic reserve (“headroom”).

Sliding controls feature LEDs that indicate the signal level of their particular frequency ranges through their varying illumination intensity: what better way to show critical frequencies that evoke feedback. How to best use your ULTRAGRAPH PRO to detect these critical frequencies is described in chapter 3.2.1.

2.2Rear panel

Fig. 2.2: Control elements and important information on the

rear of the FBQ3102

The POWER switch powers up your ULTRAGRAPH PRO. The POWER switch should always be in the “Off” position when you are about to connect your FBQ to the mains.

To disconnect the unit from the mains, pull out the main cord plug. When installing the product, ensure that the plug is easily accessible. If mounting in a rack, ensure that the mains can be easily disconnected by a plug or by an all-pole disconnect switch on or near the rack.

+Please keep in mind: The POWER switch does not entirely separate the unit from the mains. Please disconnect the power cord from the mains if you will not be using your FBQ for longer periods of time.

FBQ1502’s power switch is located at the front.

The connection to the mains is done via a standard IEC connector. A matching cable is included.

FUSE COMPARTMENT / VOLTAGE SELECTION. Before connecting the unit to a power outlet, please make sure that the selected voltage matches your local voltage. When replacing fuses, please make sure that you always use fuses of the same type. Some units allow for switching between 230 V and 120 V. Please note: when connecting

2. CONTROL ELEMENTS AND CONNECTORS 5